--- old/src/java.base/share/classes/java/net/DatagramSocketImpl.java	2020-07-23 17:23:18.083597194 -0700
+++ new/src/java.base/share/classes/java/net/DatagramSocketImpl.java	2020-07-23 17:23:17.703597194 -0700
@@ -58,6 +58,11 @@
 public abstract class DatagramSocketImpl implements SocketOptions {
 
     /**
+     * Constructor for subclasses to call.
+     */
+    public DatagramSocketImpl() {}
+
+    /**
      * The local port number.
      */
     protected int localPort;